Ventilator



0. KRWIEN.

VENTLATOR.

APPLICA-HON FFLED SEPT. 29| 1920, 1,399,126, Patented D60. 6, 1921.

:El 1 le zo r I. '22

* lill OTT Rwi UNITED STATES OTTO KERWIEN, OF MINNEAPOLIS, MINNESOTA.

VENTILATOR.

Specification of Letters Patent.

Patented Dec. 6, 1921.

Application ined september 2e, 1920. serial No. 413,537. j

' 'o all 'wiz-0m may concern.

Be it l-:nown that G'r'ro lnnwniN a citizen of the United States, residing at Minnaapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Yimprovements in Ventilatore, of which the `following is a specification, refereine being` had to the accompanying drawings.

This invention relates to ventilators, and particularly to a ventilator for refrigerators. n object of the invention is to provide a ventilator or this character capable of being readily attached to any form of refrigerator and which permits the escape of gases or impure air troni the refrigerator without ermitting the entrance of fresh or warm tir through the ventilator' into the box.

Another object is to provide a ventilator of this character having an indirect passage the exhaust of warm air within the rei tor, said indirect passage preventing the entrance of warm air into the refrigerator through the ventilator.

stili further obje-ft of the invention is to provide ventilator' of this character wherein the lons parts of the device may be readily disassembled for cleaning.

Y 7Vit- .these and other objects in view, the invention consists in the improved construction ai d arrangement of parts to be hereinafter more particularly described, fully claimed illustrated in the accompanying drawing, in which:

Figure 1 is vertical elevation of a refrigerator showing the ventilator applied;

2 is a. vertical sectional view of the ventilator;

Fig. 3 is a top plan view showing the cover plate open;

Fig., el is a top plan View showing the cover plate closed;

Fig. 5 is a detail view of the air filter and de'iector;

vdig. 6 is a vertical elevation. neferring to the drawings, 5 designates a base plate adapted to engage the inner surface of the refrigerator A. The plate 5 has an annular liange 5iL and a central opening 6 ac apted to register with a similar opening B provided in the refrigerator. It is, of course, obvious that the opening B may be provided in the top of the refrigerator, the front or either side of the same near the top. A. cylindrical body member or casing 7 is provided, said casing being open at its ends 8 and 9 and arranged to haveY its end Y9 secured in the opening of the plate 5. The marginal edge the end 9 is formedA into a plurality of supporting tabs 10, which are extended inwardly and upwardly toward the center of the casing to provide a support for a frusto-conical bottom member 11. The member 11 has a central opening lOasmaller in diameter than the opening 6 and disposed inwardly of the casing. The casing 7 is also provide `vl with a plurality of inwardlyprojecting ribs 12, said ribs extending longitudinally of the casing, the purpose of which will be hereinafter described.

1n order to permit the escape of warm or impure air from the refrigerator without permitting the entrance of air into the refrigerator through the ventilator, I provide a novel air filter consisting of a casing 13 formed of wire fabric and open at its ends.V

This casing is smaller than the casing 7 and is disposed in spaced relation to the inner walls of the easing by means of the ribs 12. The end 1d of the casing 18 is intended to ge the 'truste-conical member 11 of the 7 and positioned so that the opening 10l1 is disposed inwardly of the casing 13. The end 15 of said easing is closed by means of concavo-convex air deflecting'cap 16, the edge of said cap being provided with a flange adapted to engage the edge of the end 15, while the handle 17 projects from the concave surface of the cap so as to permit the cap to be readily removed for cleaning, etc. llihen the casing 13 is disposed within the casing 7, the handle 17 is disposed even with tne open end 8 of the casing 7.

Carried by the end 8 of the casing 7 is a guide plate A18 having a central opening 19 which registers with the open end 8 of the casing 7. The longitudinal marginal edges of the plate 18 are turned back upon the same to provide guides 20. One end of the plate is extended back to provide a stop 21, while a strip 21aL entends laterally of the opposite end and is secured to the guides 20. n cover plate 22 is provided, the marginal edges of said plate being arranged to engage the guides 2O and stop 21 of the plate 18, while a laterally extending stop 23 is formed adjacent one end of the plate and adapted to engage the strip 21a to prevent disengagement of the plate from the guide plate. The cover 22 is also provided with a central opening Qd smaller in diameter than the opening 19, said opening being disposed over the opening 19 and open end of the casing 7. A sheet of wire fabric 25 is disposed over the opening 24 to prevent the entrance of dirt or like foreign matter into the ventilator but at the same time to ermit unobstructed discharge of impure air from the refrigerator.

It is a well knownfact that air or gases that accumulate Within a refrigerator cause the ice to melt rapidly, and the quantity of this air is increased every time the door of the refrigerator is opened, and with the conventional form of refrigerators, no means is providedV to remove this air, which, of course, is forced to the top of the refrigerator by the cool or pure air. With my device, the impure air that rises to the top of the refrigerator is caused to pass through the opening 6 and opening in the frustoconical end of the'casing 7, into the wire fabric casin 13. The casing 13 is smaller than the casing 7 and is therefore held in spaced relation to the inner walls of said casing by the ribs 12, said ribs forming pascasing 13. The air thenpasses over thede` flector 16 andthrough the cover plate 22, the wire fabric covering of the opening 24 preventing the entrance of foreign matter. In View of this novel construction, an indirect p'assageis provided for the ii'npure and in view Vof this indirect passage, it is vimpossible for the air to return or for warm air to enter the refrigerator by through the ventilator.

Should it be desired to clean the ventilator, the cover 24 can bercadily removed so as to permit removal of the air filter or wire fabric casing 13, the opening 19 having the same diameter as the open end of the casing 7 so that the casing 13 may be readily disengaged therefrom. Should it be desired to render ithe refrigerator air-tight, for instance when the same is not in use, the cover 22 can be moved so as to bring'the lsolid portion of one end thereof over the opening 19. thereby closingthe ventilator.

From the foregoing, it will be readily seen that this invention provides a novel form of ventilator which is simple and compact in form,` may be applied to any refrigerator,

p assing and operates efficiently atvall times to permit the escape of impure air and prevent the entrance of warm air into the refrigerator. Y

I claim r- Y 1. A device of the character. `described comprising a casing having an upper open end, means for partially closing the lower end of said casing, a supplemental casing disposed within the first mentioned casing, said casing having wire fabric walls and open at its ends, a removable air deflector carried by one end of said second men-V tioned casing, a guide plate secured to the upp-er end of the first mentioned casing, said plate having an opening registering with.

the end of the casing, a cover plate slidable onsaid guide plate, said Vcover plate having an opening adapted to be disposed over the opening in tl e guide plate, and 1vire fabric covering for said last mentioned opening.

2. A device of the character described comprising a body member open at its ends, longitudinally extending ribs formed in Wardly of the body member, a reticulated .casing disposed Within the body member,

said casing being positioned in spaced relation to the inner wallof the body member by said ribs to provide air passages, and an airv deflector carried by and closing one end of the casing, whereby air is deflected through the casing into said passages.

3. A device of thev character described comprising a body member Open at its ends, longitudinally extending ribs formed inwardly of the body member,` a reticulated casing disposed within the body member, said casing being positioned in spaced relation to the inner wall of the body member by Vsaid ribs to provide air passages, and a K signature;

OTTO KERWIEN.

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